Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 274, NWS Grand Forks, ND

August 27, 2002Benson County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 27, 2002, 12:26 AM CDT for Benson County, North Dakota. It was in force for 49 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 27, 2002, 12:26 AM CDT (05:26 UTC)
Expired: Aug 27, 2002, 1:15 AM CDT
In force: 49 min
Issued by: NWS Grand Forks, ND
Area: Counties, with a storm outline in the text

County Benson County, ND

What was reported inside it

Time	Report	Where	Remark
Aug 27, 12:28 AM CDT	Hail 0.75	Minnewaukan, ND

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 5.4 hours before the alert went out and 177 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 599 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 2538 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: -36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

899 
WUUS53 KFGF 270526
SVRFAR
NDC005-270615-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1225 AM CDT TUE AUG 27 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  BENSON COUNTY IN NORTHEAST NORTH DAKOTA.

* UNTIL 115 AM CDT.

* AT 1223 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 2 MILES WEST OF MINNEWAUKAN...OR ABOUT 20 MILES
  WEST OF DEVILS LAKE...MOVEMENT WAS TO THE NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  BRINSMADE AT 1230 AM.

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

LAT...LON 4809 9951 4793 9938 4801 9917 4829 9926


BERG

NNNN

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 26, 8:15 PM CDT, 4 hours 11 minutes earlier.

Area forecast discussion, Aug 26, 8:15 PM CDT, 4 hours 11 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
815 PM CDT MON AUG 26 2002

MAIN CHALLENGE YET THIS EVENING IS ONGOING SEVERE WEATHER. SEVERE
THUNDERSTORM WATCH CONTINUES FOR A PORTION OF WESTERN FA UNTIL 9 PM
CDT. HOWEVER...QUITE A BIT OF SEVERE WEATHER CONTINUES OVER THE
ENTIRE AREA...NOT JUST THE WATCH AREA. LATEST SFC MAP SHOWS WEAK SFC
LOW OVER THE CENTRAL DAKOTAS WITH A NUMBER OF BOUNDARIES OVER THE
FA. WITH WEAK WIND FLOW THROUGHOUT THE ENTIRE COLUMN...HARD TO PICK
OUT EXACTLY WHERE THE MAIN BOUNDARIES ARE. HOWEVER...THERE WAS A
WARM FRONT OVER THE CENTRAL PORTION OF THE FA EARLIER WITH TEMPS
SURGING TO AROUND 90. THIS BOUNDARY APPEARS TO BE SAGGING SLOWLY
SOUTHWARD INTO WEST CENTRAL MN WHERE PLENTY OF MOISTURE REMAINS.
12Z/18Z ETA/AVN SHOW ANOTHER VORTICITY LOBE MOVING INTO THIS AREA
AROUND 06Z. SECOND AREA OF CONVECTION OVER NORTHEAST NORTH DAKOTA
ASSOCIATED WITH THE MAIN WAVE WHICH SHOWS UP WELL ON WATER VAPOR
IMAGERY. THIS AREA ALSO HAS THE BEST INSTABILITY ON MSAS...WITH SFC
BASED LIS TO -11. THEREFORE EXPECT SEVERE WEATHER THREAT TO
CONTINUE AT LEAST THROUGH THE WATCH EXPIRATION TIME AND LIKELY
AFTER. THIS COVERED WELL IN CURRENT ZONES. WILL WAIT TO SEE WHAT SPC
DECIDES TO DO WITH WATCHES BEFORE UPDATING SINCE WATCH WILL BE ONLY
BIG ZONE CHANGE.

.FGF...NONE.

GODON

In the hours before

Local storm report, Aug 26, 7:18 PM CDT, 5 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
718 PM CDT MON AUG 26 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0716 PM    PARK RIVER                ND   1.25 INCH HAIL
08/26/02   WALSH

DPORTER

Local storm report, Aug 26, 7:20 PM CDT, 5 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
720 PM CDT MON AUG 26 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0718 PM    PARK RIVER                ND   1.75 INCH HAIL
08/26/02   WALSH                          REPORTED BY LAW
                                          ENFORCEMENT.

DPORTER

Local storm report, Aug 26, 7:49 PM CDT, 4 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
749 PM CDT MON AUG 26 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0600 AM    3 E RANUM                 MN   .75 INCH HAIL
08/26/02   NORMAN

0610 PM    FERTILE                   MN   .75 INCH HAIL
08/26/02   POLK

0615 PM    3 NW BEJOU                MN   .75 INCH HAIL
08/26/02   MAHNOMEN

0700 PM    5 SW BORUP                MN   .75 INCH HAIL
08/26/02   NORMAN

0700 PM    7 NW FELTON               MN   .88 INCH HAIL
08/26/02   CLAY

0720 PM    2 SW FELTON               MN   .75 INCH HAIL
08/26/02   CLAY

0730 PM    3 NW FELTON               MN   WIND DAMAGE
08/26/02   CLAY                           3 INCH TREE BRANCHES DOWN.
                                          REPORTED BY PUBLIC.

DPORTER

Local storm report, Aug 26, 8:52 PM CDT, 3 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
852 PM CDT MON AUG 26 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0852 PM    4 NE ELIZABETH            MN   1.00 INCH HAIL
08/26/02   OTTER TAIL                     REPORTED BY PUBLIC.

DPORTER

Local storm report, Aug 26, 9:15 PM CDT, 3 hours 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
915 PM CDT MON AUG 26 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0345 PM    7 E EUCLID                MN   .88 INCH HAIL
08/26/02   POLK                           HAIL ONE INCH DEEP ON
                                          GROUND. REPORTED BY PUBLIC.

0345 PM    EUCLID                    MN   1.00 INCH HAIL
08/26/02   POLK                           REPORTED BY PUBLIC.

0400 PM    3 NE DOROTHY              MN   1.00 INCH HAIL
08/26/02   RED LAKE                       REPORTED BY PUBLIC.

0407 PM    6 SE EUCLID               MN   TORNADO
08/26/02   POLK                           REPORTED BY TRAINED
                                          SPOTTER.

0415 PM    6 W RED LAKE FALLS        MN   1.00 INCH HAIL
08/26/02   RED LAKE                       REPORTED BY PUBLIC.

0415 PM    4 W ST. HILAIRE           MN   .88 INCH HAIL
08/26/02   PENNINGTON                     REPORTED BY PUBLIC.

0430 PM    RED LAKE FALLS            MN   1.25 INCH HAIL
08/26/02   RED LAKE                       HAIL FELL FOR 25 MINUTES.
                                          REPORTED BY CO-OP OBSERVER.

0430 PM    RED LAKE FALLS            MN   .75 INCH HAIL
08/26/02   RED LAKE                       REPORTED BY CO-OP OBSERVER.

0445 PM    RED LAKE FALLS            MN   1.00 INCH HAIL
08/26/02   RED LAKE                       REPORTED BY CO-OP OBSERVER.

0455 PM    6 SW MINNEWAUKAN          ND   1.00 INCH HAIL
08/26/02   BENSON                         REPORTED BY CO-OP OBSERVER.

0500 PM    MINNEWAUKAN               ND   .88 INCH HAIL
08/26/02   BENSON                         HAIL FELL FOR HALF AN
                                          HOUR. REPORTED BY LAW
                                          ENFORCEMENT.

0512 PM    MADDOCK                   ND   .75 INCH HAIL
08/26/02   BENSON

0512 PM    2 W TERREBONNE            MN   1.00 INCH HAIL
08/26/02   RED LAKE                       SMALL BRANCHES DOWN.

0540 PM    PENN                      ND   1.00 INCH HAIL
08/26/02   RAMSEY

0545 PM    LEEDS                     ND   .88 INCH HAIL
08/26/02   BENSON                         REPORTED BY CO-OP OBSERVER.

0600 PM    3 E RANUM                 MN   .75 INCH HAIL
08/26/02   NORMAN

0610 PM    FERTILE                   MN   .75 INCH HAIL
08/26/02   POLK

0615 PM    3 NW BEJOU                MN   .75 INCH HAIL
08/26/02   MAHNOMEN

0615 PM    WINGER                    MN   .75 INCH HAIL
08/26/02   POLK                           HAIL ONE INCH DEEP ON
                                          GROUND.

0620 PM    CANDO                     ND   .75 INCH HAIL
08/26/02   TOWNER                         REPORTED BY CO-OP OBSERVER.

0630 PM    4 NE WASKISH              MN   .75 INCH HAIL
08/26/02   BELTRAMI                       HAIL FELL FOR 15 MINUTES.

0640 PM    5 NW BISBEE               ND   .75 INCH HAIL
08/26/02   TOWNER

0700 PM    5 SW BORUP                MN   .75 INCH HAIL
08/26/02   NORMAN

0700 PM    7 NW FELTON               MN   .88 INCH HAIL
08/26/02   CLAY

0705 PM    PARK RIVER                ND   .75 INCH HAIL
08/26/02   WALSH

0716 PM    PARK RIVER                ND   1.25 INCH HAIL
08/26/02   WALSH

0718 PM    PARK RIVER                ND   1.75 INCH HAIL
08/26/02   WALSH                          REPORTED BY LAW
                                          ENFORCEMENT.

0720 PM    2 SW FELTON               MN   .75 INCH HAIL
08/26/02   CLAY

0730 PM    3 NW FELTON               MN   WIND DAMAGE
08/26/02   CLAY                           3 INCH TREE BRANCHES DOWN.
                                          REPORTED BY PUBLIC.

0852 PM    4 NE ELIZABETH            MN   1.00 INCH HAIL
08/26/02   OTTER TAIL                     REPORTED BY PUBLIC.

DPORTER

Local storm report, Aug 26, 9:54 PM CDT, 2 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND FORKS, ND
954 PM CDT MON AUG 26 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0442 PM    2 NW VERGAS               MN   .88 INCH HAIL
08/26/02   OTTER TAIL

0455 PM    2 SW PENCER               MN   .75 INCH HAIL
08/26/02   ROSEAU

0525 PM    3 SW BROOKS               MN   .75 INCH HAIL
08/26/02   RED LAKE

0540 PM    PENN                      ND   1.75 INCH HAIL
08/26/02   RAMSEY                         BROKE WINDOWS

0620 PM    FOSSTON                   MN   1.75 INCH HAIL
08/26/02   POLK

0852 PM    4 NE ELIZABETH            MN   1.00 INCH HAIL
08/26/02   OTTER TAIL

WJB

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 26, 7:44 PM CDT	Severe Thunderstorm Warning	FGF	Walsh	46 min
Aug 26, 7:49 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	41 min
Aug 26, 8:08 PM CDT	Flash Flood Warning	FGF	Walsh	6 hr
Aug 26, 11:18 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	42 min
Aug 27, 1:33 AM CDT	Severe Thunderstorm Warning	FGF	Ramsey	42 min
Aug 27, 2:07 AM CDT	Severe Thunderstorm Warning	FGF	Benson	38 min
Aug 27, 3:34 AM CDT	Flash Flood Warning	FGF	Benson, Ramsey	6 hr
Aug 27, 10:05 AM CDT	Severe Thunderstorm Warning	FGF	Cavalier	55 min
Aug 27, 5:23 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	37 min
Aug 27, 5:58 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	47 min
Aug 27, 6:34 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	56 min
Aug 27, 6:48 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	42 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.